I thought I should draw attention to the fact that the article by CR Morey on the West Angle sediment sequence has now been placed online by the Ussher Society:
The main interest of this work lies in the confirmation by Morey that the silt and clay series at West Angle is not a result of a big marine transgression, but is a series of muds and clays laid down in a dune slack situation, probably behind a coastal dune barrier. The evidence of freshwater organic materials is quite convincing, and most authors are now agreed that the organic sediments (including a peat bed which has been eroded away) probably date from the last interglacial.
However, I part company with Morey when he interprets the overlying reddish diamicton as a periglacial solifluction deposit. This is a weird and unnecessary interpretation of the prominent deposit which occupies the northern part of the cliff exposure:
So we can suggest that the stratigraphic and age relationships of the West Angle deposits are as follows:
10. Made ground and soil -- modern
9. Dark red stratified horizon -- late glacial (Devensian / Holocene transition
8. Dark red diamicton (non-stratified) -- Late Devensian glaciation (LGM)
7. Orange silt and clay series -- Ipswichian interglacial dune slack environment (freshwater)
6. Grey silt and clay series -- ditto
5. Peat and peaty silt -- ditto
4. Stony grey silts -- up to 1.5 m thick -- ditto (includes some slope breccia material?)
3. Ferruginous bedded sands and gravels -- up to 1.5 m thick -- Ipswichian shoreline deposits?
2. Rounded pebbles / beach shingle in a sandy and gravelly matrix -- up to 1.8 m thick -- Ipswichian raised beach
1. Sand layer -- more than 1 m thick -- Ipswichian sandy beach
Morey, C.R. 1997. A re-examination of the valley-fill deposits at West Angle Bay, Pembrokeshire.Proceedings of the Ussher Society, 9, 164-167.
The picture that has emerged from the current work is that of a valley excavated in bedrock during the Early Pleistocene and subsequently filled by till during a glaciation which transported erratics of igneous material and sediments of Mesozoic and Westphalian age from the north and west. During a subsequent interglacial, drainage was impeded by the build-up of a dune belt at the coast. Alluviation took place in a slack behind the dune belt and it is some of this material that is now exposed in the coast section.
Subsequent cold cycles were marked by gully erosion and by two phases of solifluction. Deposits from the early phase are distinguished by the fact that they contain re-distributed erratic material. There is also evidence for landslipping or subsidence involving partially frozen ground, perhaps following the erosion of a coastal dune belt.